142454909 has 2 divisors, whose sum is σ = 142454910. Its totient is φ = 142454908.

The previous prime is 142454903. The next prime is 142454911. The reversal of 142454909 is 909454241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129458884 + 12996025 = 11378^2 + 3605^2 .

It is a cyclic number.

It is not a de Polignac number, because 142454909 - 2²⁰ = 141406333 is a prime.

Together with 142454911, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142454903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71227454 + 71227455.

It is an arithmetic number, because the mean of its divisors is an integer number (71227455).

Almost surely, 2^142454909 is an apocalyptic number.

It is an amenable number.

142454909 is a deficient number, since it is larger than the sum of its proper divisors (1).

142454909 is an equidigital number, since it uses as much as digits as its factorization.

142454909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 142454909 is about 11935.4475827260. The cubic root of 142454909 is about 522.2668651556.

The spelling of 142454909 in words is "one hundred forty-two million, four hundred fifty-four thousand, nine hundred nine".